Louise Henriette de Bourbon, Mademoiselle de Conti at birth, was a French princess, who, by marriage, became Duchess of Chartres (1743–1752), then Duchess of Orléans (1752–1759) upon the death of her father-in-law. On 4 February 1752, her husband became the head of the House of Orléans, and the First Prince of the Blood, the most important personage after the immediate members of the royal family.

The 4th House of Orléans, sometimes called the House of Bourbon-Orléans to distinguish it, is the fourth holder of a surname previously used by several branches of the Royal House of France, all descended in the legitimate male line from the dynasty's founder, Hugh Capet. The house was founded by Philippe I, Duke of Orléans, younger son of Louis XIII and younger brother of Louis XIV, the "Sun King".